Amazon is now a part of the Federal Trade Commission’s investigations into technology corporations with mobile application marketplaces unlawfully billing parents for in-app-purchases. Both Apple and Google have been tangled in the allegations with Apple settling earlier this year and Apple telling the FTC to investigate Google. The FTC today announced it is filing a complaint against Amazon, saying that children have been able to buy goods and extras within apps without the consent of parents. The full release from the FTC can be found below:

Amazon.com, Inc. has billed parents and other account holders for millions of dollars in unauthorized in-app charges incurred by children, according to a Federal Trade Commission complaint filed today in federal court.

Amazon offers many children’s apps in its appstore for download to mobile devices such as the Kindle Fire. In its complaint, the FTC alleges that Amazon violated the FTC Act by billing parents and other Amazon account holders for charges incurred by their children without the permission of the parent or other account holder. Amazon’s setup allowed children playing these kids’ games to spend unlimited amounts of money to pay for virtual items within the apps such as “coins,” “stars,” and “acorns” without parental involvement.

“Amazon’s in-app system allowed children to incur unlimited charges on their parents’ accounts without permission,” said FTC Chairwoman Edith Ramirez. “Even Amazon’s own employees recognized the serious problem its process created. We are seeking refunds for affected parents and a court order to ensure that Amazon gets parents’ consent for in-app purchases.”

The complaint alleges that when Amazon introduced in-app charges to the Amazon Appstore in November 2011, there were no password requirements of any kind on in-app charges, including in kids’ games and other apps that appeal to children. According to the complaint, this left parents to foot the bill for charges they didn’t authorize.

According to the complaint, kids’ games often encourage children to acquire virtual items in ways that blur the lines between what costs virtual currency and what costs real money. In the app “Ice Age Village,” for example, the complaint noted that children can use “coins” and “acorns” to buy items in the game without a real-money charge. However, they can also purchase additional “coins” and “acorns” using real money on a screen that is visually similar to the one that has no real-money charge. The largest quantity purchase available in the app would cost $99.99.

The complaint highlights internal communications among Amazon employees as early as December 2011 that said allowing unlimited in-app charges without any password was “…clearly causing problems for a large percentage of our customers,” adding that the situation was a “near house on fire.”

In March 2012, according to the complaint, Amazon updated its in-app charge system to require an account owner to enter a password only for individual in-app charges over $20. As the complaint notes, Amazon continued to allow children to make an unlimited number of individual purchases of less than $20 without a parent’s approval. An Amazon employee noted at the time of the change that “it’s much easier to get upset about Amazon letting your child purchase a $99 product without any password protection than a $20 product,” according to the complaint. In July 2012, as set forth in the complaint, internal emails again described consumer complaints about in-app charges as a “house on fire” situation.

The complaint alleges that in early 2013, Amazon updated its in-app charge process to require password entry for some charges in a way that functioned differently in different contexts. According to the complaint, even when a parent was prompted for a password to authorize a single in-app charge made by a child, that single authorization often opened an undisclosed window of 15 minutes to an hour during which the child could then make unlimited charges without further authorization. Not until June 2014, roughly two and a half years after the problem first surfaced and only shortly before the Commission voted to approve the lawsuit against Amazon, did Amazon change its in-app charge framework to obtain account holders’ informed consent for in-app charges on its newer mobile devices, as explained in the complaint.

According to the complaint, thousands of parents complained to Amazon about in-app charges their children incurred without their authorization, amounting to millions of dollars of charges. For example, one mother noted in the FTC complaint told Amazon that her daughter was able to rack up $358.42 in unauthorized charges, while others complained that even children who could not read were able to “click a lot of buttons at random” and incur several unauthorized charges.

The company’s stated policy is that all in-app charges are final and nonrefundable. According to the complaint, even parents who have sought an exception to that policy have faced a refund process that is unclear and confusing, involving statements that do not explain how to seek refunds for in-app charges or suggest consumers cannot get a refund for these charges.

This is the Commission’s second case relating to children’s in-app purchases; Apple, Inc. settled an FTC complaint concerning the issue earlier this year. The Commission is seeking full refunds for all affected consumers, disgorgement of Amazon’s ill-gotten gains, and a court order ensuring that in the future Amazon obtains permission before imposing charges for in-app purchases.

The Commission vote authorizing the staff to file the complaint was 4-1, with Commissioner Joshua D. Wright voting no. The complaint was filed in the U.S. District Court for the Western District of Washington.